/* SPDX-License-Identifier: GPL-2.0-only */

  /*
   * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.

   * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.

   */
  
  #ifndef __INCORE_DOT_H__
  #define __INCORE_DOT_H__

  #include <linux/fs.h>

  #include <linux/kobject.h>

  #include <linux/workqueue.h>

  #include <linux/dlm.h>
  #include <linux/buffer_head.h>

  #include <linux/rcupdate.h>
  #include <linux/rculist_bl.h>

  #include <linux/completion.h>

  #include <linux/rbtree.h>

  #include <linux/ktime.h>
  #include <linux/percpu.h>

  #include <linux/lockref.h>

  #include <linux/rhashtable.h>

  #define DIO_WAIT	0x00000010
  #define DIO_METADATA	0x00000020

  
  struct gfs2_log_operations;

  struct gfs2_bufdata;

  struct gfs2_holder;
  struct gfs2_glock;

  struct gfs2_quota_data;

  struct gfs2_trans;

  struct gfs2_jdesc;

  struct gfs2_sbd;

  struct lm_lockops;

  
  typedef void (*gfs2_glop_bh_t) (struct gfs2_glock *gl, unsigned int ret);

  struct gfs2_log_header_host {
  	u64 lh_sequence;	/* Sequence number of this transaction */
  	u32 lh_flags;		/* GFS2_LOG_HEAD_... */
  	u32 lh_tail;		/* Block number of log tail */
  	u32 lh_blkno;

  };

  /*
   * Structure of operations that are associated with each
   * type of element in the log.
   */
  
  struct gfs2_log_operations {

  	void (*lo_before_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);

  	void (*lo_after_commit) (struct gfs2_sbd *sdp, struct gfs2_trans *tr);

  	void (*lo_before_scan) (struct gfs2_jdesc *jd,

  				struct gfs2_log_header_host *head, int pass);

  	int (*lo_scan_elements) (struct gfs2_jdesc *jd, unsigned int start,
  				 struct gfs2_log_descriptor *ld, __be64 *ptr,
  				 int pass);
  	void (*lo_after_scan) (struct gfs2_jdesc *jd, int error, int pass);

  	const char *lo_name;

  };

  #define GBF_FULL 1

  /**
   * Clone bitmaps (bi_clone):
   *
   * - When a block is freed, we remember the previous state of the block in the
   *   clone bitmap, and only mark the block as free in the real bitmap.
   *
   * - When looking for a block to allocate, we check for a free block in the
   *   clone bitmap, and if no clone bitmap exists, in the real bitmap.
   *
   * - For allocating a block, we mark it as allocated in the real bitmap, and if
   *   a clone bitmap exists, also in the clone bitmap.
   *
   * - At the end of a log_flush, we copy the real bitmap into the clone bitmap
   *   to make the clone bitmap reflect the current allocation state.
   *   (Alternatively, we could remove the clone bitmap.)
   *
   * The clone bitmaps are in-core only, and is never written to disk.
   *
   * These steps ensure that blocks which have been freed in a transaction cannot
   * be reallocated in that same transaction.
   */

  struct gfs2_bitmap {
  	struct buffer_head *bi_bh;
  	char *bi_clone;

  	unsigned long bi_flags;

  	u32 bi_offset;
  	u32 bi_start;

  	u32 bi_bytes;

  	u32 bi_blocks;

  };
  
  struct gfs2_rgrpd {

  	struct rb_node rd_node;		/* Link with superblock */

  	struct gfs2_glock *rd_gl;	/* Glock for this rgrp */

  	u64 rd_addr;			/* grp block disk address */
  	u64 rd_data0;			/* first data location */
  	u32 rd_length;			/* length of rgrp header in fs blocks */
  	u32 rd_data;			/* num of data blocks in rgrp */
  	u32 rd_bitbytes;		/* number of bytes in data bitmaps */

  	u32 rd_free;

  	u32 rd_reserved;                /* number of blocks reserved */

  	u32 rd_free_clone;
  	u32 rd_dinodes;

  	u64 rd_igeneration;

  	struct gfs2_bitmap *rd_bits;

  	struct gfs2_sbd *rd_sbd;

  	struct gfs2_rgrp_lvb *rd_rgl;

  	u32 rd_last_alloc;

  	u32 rd_flags;

  	u32 rd_extfail_pt;		/* extent failure point */

  #define GFS2_RDF_CHECK		0x10000000 /* check for unlinked inodes */
  #define GFS2_RDF_UPTODATE	0x20000000 /* rg is up to date */
  #define GFS2_RDF_ERROR		0x40000000 /* error in rg */

  #define GFS2_RDF_PREFERRED	0x80000000 /* This rgrp is preferred */

  #define GFS2_RDF_MASK		0xf0000000 /* mask for internal flags */

  	spinlock_t rd_rsspin;           /* protects reservation related vars */
  	struct rb_root rd_rstree;       /* multi-block reservation tree */

  };

  struct gfs2_rbm {
  	struct gfs2_rgrpd *rgd;

  	u32 offset;		/* The offset is bitmap relative */

  	int bii;		/* Bitmap index */

  };

  static inline struct gfs2_bitmap *rbm_bi(const struct gfs2_rbm *rbm)
  {
  	return rbm->rgd->rd_bits + rbm->bii;
  }

  static inline u64 gfs2_rbm_to_block(const struct gfs2_rbm *rbm)
  {

  	BUG_ON(rbm->offset >= rbm->rgd->rd_data);

  	return rbm->rgd->rd_data0 + (rbm_bi(rbm)->bi_start * GFS2_NBBY) +
  		rbm->offset;

  }

  static inline bool gfs2_rbm_eq(const struct gfs2_rbm *rbm1,
  			       const struct gfs2_rbm *rbm2)
  {

  	return (rbm1->rgd == rbm2->rgd) && (rbm1->bii == rbm2->bii) &&

  	       (rbm1->offset == rbm2->offset);
  }

  enum gfs2_state_bits {
  	BH_Pinned = BH_PrivateStart,

  	BH_Escaped = BH_PrivateStart + 1,

  };
  
  BUFFER_FNS(Pinned, pinned)
  TAS_BUFFER_FNS(Pinned, pinned)

  BUFFER_FNS(Escaped, escaped)
  TAS_BUFFER_FNS(Escaped, escaped)

  
  struct gfs2_bufdata {
  	struct buffer_head *bd_bh;
  	struct gfs2_glock *bd_gl;

  	u64 bd_blkno;

  	struct list_head bd_list;

  	struct gfs2_trans *bd_tr;

  	struct list_head bd_ail_st_list;
  	struct list_head bd_ail_gl_list;
  };

  /*
   * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
   * prefix of lock_dlm_ gets awkward.
   */
  
  #define GDLM_STRNAME_BYTES	25
  #define GDLM_LVB_SIZE		32

  /*
   * ls_recover_flags:
   *
   * DFL_BLOCK_LOCKS: dlm is in recovery and will grant locks that had been
   * held by failed nodes whose journals need recovery.  Those locks should
   * only be used for journal recovery until the journal recovery is done.
   * This is set by the dlm recover_prep callback and cleared by the
   * gfs2_control thread when journal recovery is complete.  To avoid
   * races between recover_prep setting and gfs2_control clearing, recover_spin
   * is held while changing this bit and reading/writing recover_block
   * and recover_start.
   *
   * DFL_NO_DLM_OPS: dlm lockspace ops/callbacks are not being used.
   *
   * DFL_FIRST_MOUNT: this node is the first to mount this fs and is doing
   * recovery of all journals before allowing other nodes to mount the fs.
   * This is cleared when FIRST_MOUNT_DONE is set.
   *
   * DFL_FIRST_MOUNT_DONE: this node was the first mounter, and has finished
   * recovery of all journals, and now allows other nodes to mount the fs.
   *
   * DFL_MOUNT_DONE: gdlm_mount has completed successfully and cleared
   * BLOCK_LOCKS for the first time.  The gfs2_control thread should now
   * control clearing BLOCK_LOCKS for further recoveries.
   *
   * DFL_UNMOUNT: gdlm_unmount sets to keep sdp off gfs2_control_wq.
   *
   * DFL_DLM_RECOVERY: set while dlm is in recovery, between recover_prep()
   * and recover_done(), i.e. set while recover_block == recover_start.
   */

  enum {
  	DFL_BLOCK_LOCKS		= 0,

  	DFL_NO_DLM_OPS		= 1,
  	DFL_FIRST_MOUNT		= 2,
  	DFL_FIRST_MOUNT_DONE	= 3,
  	DFL_MOUNT_DONE		= 4,
  	DFL_UNMOUNT		= 5,
  	DFL_DLM_RECOVERY	= 6,

  };

  /*
   * We are using struct lm_lockname as an rhashtable key.  Avoid holes within
   * the struct; padding at the end is fine.
   */

  struct lm_lockname {
  	u64 ln_number;

  	struct gfs2_sbd *ln_sbd;

  	unsigned int ln_type;

  };

  
  #define lm_name_equal(name1, name2) \

          (((name1)->ln_number == (name2)->ln_number) &&	\
  	 ((name1)->ln_type == (name2)->ln_type) &&	\
  	 ((name1)->ln_sbd == (name2)->ln_sbd))

  struct gfs2_glock_operations {

  	void (*go_sync) (struct gfs2_glock *gl);

  	int (*go_xmote_bh) (struct gfs2_glock *gl, struct gfs2_holder *gh);

  	void (*go_inval) (struct gfs2_glock *gl, int flags);

  	int (*go_demote_ok) (const struct gfs2_glock *gl);

  	int (*go_lock) (struct gfs2_holder *gh);
  	void (*go_unlock) (struct gfs2_holder *gh);

  	void (*go_dump)(struct seq_file *seq, struct gfs2_glock *gl,
  			const char *fs_id_buf);

  	void (*go_callback)(struct gfs2_glock *gl, bool remote);

  	const int go_type;

  	const unsigned long go_flags;
  #define GLOF_ASPACE 1

  #define GLOF_LVB    2

  #define GLOF_LRU    4

  };
  
  enum {

  	GFS2_LKS_SRTT = 0,	/* Non blocking smoothed round trip time */
  	GFS2_LKS_SRTTVAR = 1,	/* Non blocking smoothed variance */
  	GFS2_LKS_SRTTB = 2,	/* Blocking smoothed round trip time */
  	GFS2_LKS_SRTTVARB = 3,	/* Blocking smoothed variance */
  	GFS2_LKS_SIRT = 4,	/* Smoothed Inter-request time */
  	GFS2_LKS_SIRTVAR = 5,	/* Smoothed Inter-request variance */
  	GFS2_LKS_DCOUNT = 6,	/* Count of dlm requests */
  	GFS2_LKS_QCOUNT = 7,	/* Count of gfs2_holder queues */
  	GFS2_NR_LKSTATS
  };
  
  struct gfs2_lkstats {

  	u64 stats[GFS2_NR_LKSTATS];

  };
  
  enum {

  	/* States */

  	HIF_HOLDER		= 6,  /* Set for gh that "holds" the glock */

  	HIF_FIRST		= 7,

  	HIF_WAIT		= 10,

  };
  
  struct gfs2_holder {
  	struct list_head gh_list;
  
  	struct gfs2_glock *gh_gl;

  	struct pid *gh_owner_pid;

  	u16 gh_flags;
  	u16 gh_state;

  
  	int gh_error;

  	unsigned long gh_iflags; /* HIF_... */

  	unsigned long gh_ip;

  };

  /* Number of quota types we support */
  #define GFS2_MAXQUOTAS 2

  struct gfs2_qadata { /* quota allocation data */
  	/* Quota stuff */
  	struct gfs2_quota_data *qa_qd[2 * GFS2_MAXQUOTAS];
  	struct gfs2_holder qa_qd_ghs[2 * GFS2_MAXQUOTAS];
  	unsigned int qa_qd_num;
  };

  /* Resource group multi-block reservation, in order of appearance:
  
     Step 1. Function prepares to write, allocates a mb, sets the size hint.
     Step 2. User calls inplace_reserve to target an rgrp, sets the rgrp info
     Step 3. Function get_local_rgrp locks the rgrp, determines which bits to use
     Step 4. Bits are assigned from the rgrp based on either the reservation
             or wherever it can.
  */
  
  struct gfs2_blkreserv {

  	struct rb_node rs_node;       /* link to other block reservations */

  	struct gfs2_rbm rs_rbm;       /* Start of reservation */

  	u32 rs_free;                  /* how many blocks are still free */

  };

  /*
   * Allocation parameters
   * @target: The number of blocks we'd ideally like to allocate
   * @aflags: The flags (e.g. Orlov flag)
   *
   * The intent is to gradually expand this structure over time in
   * order to give more information, e.g. alignment, min extent size
   * to the allocation code.
   */
  struct gfs2_alloc_parms {

  	u64 target;

  	u32 min_target;

  	u32 aflags;

  	u64 allowed;

  };

  enum {

  	GLF_LOCK			= 1,

  	GLF_DEMOTE			= 3,
  	GLF_PENDING_DEMOTE		= 4,
  	GLF_DEMOTE_IN_PROGRESS		= 5,
  	GLF_DIRTY			= 6,
  	GLF_LFLUSH			= 7,
  	GLF_INVALIDATE_IN_PROGRESS	= 8,
  	GLF_REPLY_PENDING		= 9,

  	GLF_INITIAL			= 10,
  	GLF_FROZEN			= 11,

  	GLF_QUEUED			= 12,

  	GLF_LRU				= 13,
  	GLF_OBJECT			= 14, /* Used only for tracing */

  	GLF_BLOCKING			= 15,

  	GLF_INODE_CREATING		= 16, /* Inode creation occurring */

  };
  
  struct gfs2_glock {

  	unsigned long gl_flags;		/* GLF_... */
  	struct lm_lockname gl_name;

  	struct lockref gl_lockref;

  	/* State fields protected by gl_lockref.lock */

  	unsigned int gl_state:2,	/* Current state */
  		     gl_target:2,	/* Target state */
  		     gl_demote_state:2,	/* State requested by remote node */
  		     gl_req:2,		/* State in last dlm request */
  		     gl_reply:8;	/* Last reply from the dlm */

  	unsigned long gl_demote_time; /* time of first demote request */

  	long gl_hold_time;

  	struct list_head gl_holders;

  	const struct gfs2_glock_operations *gl_ops;

  	ktime_t gl_dstamp;
  	struct gfs2_lkstats gl_stats;

  	struct dlm_lksb gl_lksb;

  	unsigned long gl_tchange;

  	void *gl_object;

  	struct list_head gl_lru;

  	struct list_head gl_ail_list;
  	atomic_t gl_ail_count;

  	atomic_t gl_revokes;

  	struct delayed_work gl_work;

  	union {
  		/* For inode and iopen glocks only */
  		struct work_struct gl_delete;
  		/* For rgrp glocks only */
  		struct {
  			loff_t start;
  			loff_t end;
  		} gl_vm;
  	};

  	struct rcu_head gl_rcu;

  	struct rhash_head gl_node;

  };

  #define GFS2_MIN_LVB_SIZE 32	/* Min size of LVB that gfs2 supports */

  enum {

  	GIF_INVALID		= 0,

  	GIF_QD_LOCKED		= 1,

  	GIF_ALLOC_FAILED	= 2,

  	GIF_SW_PAGED		= 3,

  	GIF_ORDERED		= 4,

  	GIF_FREE_VFS_INODE      = 5,

  	GIF_GLOP_PENDING	= 6,

  };
  
  struct gfs2_inode {

  	struct inode i_inode;

  	u64 i_no_addr;
  	u64 i_no_formal_ino;

  	u64 i_generation;

  	u64 i_eattr;

  	unsigned long i_flags;		/* GIF_... */

  	struct gfs2_glock *i_gl; /* Move into i_gh? */

  	struct gfs2_holder i_iopen_gh;

  	struct gfs2_holder i_gh; /* for prepare/commit_write only */

  	struct gfs2_qadata *i_qadata; /* quota allocation data */

  	struct gfs2_holder i_rgd_gh;

  	struct gfs2_blkreserv i_res; /* rgrp multi-block reservation */

  	u64 i_goal;	/* goal block for allocations */

  	atomic_t i_sizehint;  /* hint of the write size */

  	struct rw_semaphore i_rw_mutex;

  	struct list_head i_ordered;

  	struct list_head i_trunc_list;

  	__be64 *i_hash_cache;

  	u32 i_entries;

  	u32 i_diskflags;

  	u8 i_height;

  	u8 i_depth;

  	u16 i_rahead;

  };

  /*
   * Since i_inode is the first element of struct gfs2_inode,
   * this is effectively a cast.
   */

  static inline struct gfs2_inode *GFS2_I(struct inode *inode)
  {
  	return container_of(inode, struct gfs2_inode, i_inode);
  }

  static inline struct gfs2_sbd *GFS2_SB(const struct inode *inode)

  {
  	return inode->i_sb->s_fs_info;
  }

  struct gfs2_file {

  	struct mutex f_fl_mutex;

  	struct gfs2_holder f_fl_gh;

  };

  struct gfs2_revoke_replay {
  	struct list_head rr_list;

  	u64 rr_blkno;

  	unsigned int rr_where;
  };
  
  enum {

  	QDF_CHANGE		= 1,
  	QDF_LOCKED		= 2,

  	QDF_REFRESH		= 3,

  	QDF_QMSG_QUIET          = 4,

  };
  
  struct gfs2_quota_data {

  	struct hlist_bl_node qd_hlist;

  	struct list_head qd_list;

  	struct kqid qd_id;

  	struct gfs2_sbd *qd_sbd;

  	struct lockref qd_lockref;

  	struct list_head qd_lru;

  	unsigned qd_hash;

  	unsigned long qd_flags;		/* QDF_... */

  	s64 qd_change;
  	s64 qd_change_sync;

  
  	unsigned int qd_slot;
  	unsigned int qd_slot_count;
  
  	struct buffer_head *qd_bh;
  	struct gfs2_quota_change *qd_bh_qc;
  	unsigned int qd_bh_count;
  
  	struct gfs2_glock *qd_gl;
  	struct gfs2_quota_lvb qd_qb;

  	u64 qd_sync_gen;

  	unsigned long qd_last_warn;

  	struct rcu_head qd_rcu;

  };

  enum {
  	TR_TOUCHED = 1,
  	TR_ATTACHED = 2,
  	TR_ALLOCED = 3,
  };

  struct gfs2_trans {

  	unsigned long tr_ip;

  
  	unsigned int tr_blocks;
  	unsigned int tr_revokes;
  	unsigned int tr_reserved;

  	unsigned long tr_flags;

  	unsigned int tr_num_buf_new;

  	unsigned int tr_num_databuf_new;

  	unsigned int tr_num_buf_rm;

  	unsigned int tr_num_databuf_rm;

  	unsigned int tr_num_revoke;

  	struct list_head tr_list;

  	struct list_head tr_databuf;
  	struct list_head tr_buf;

  	unsigned int tr_first;
  	struct list_head tr_ail1_list;
  	struct list_head tr_ail2_list;

  };

  struct gfs2_journal_extent {

  	struct list_head list;

  
  	unsigned int lblock; /* First logical block */
  	u64 dblock; /* First disk block */
  	u64 blocks;
  };

  struct gfs2_jdesc {
  	struct list_head jd_list;

  	struct list_head extent_list;

  	unsigned int nr_extents;

  	struct work_struct jd_work;

  	struct inode *jd_inode;

  	unsigned long jd_flags;
  #define JDF_RECOVERY 1

  	unsigned int jd_jid;

  	u32 jd_blocks;

  	int jd_recover_error;

  	/* Replay stuff */
  
  	unsigned int jd_found_blocks;
  	unsigned int jd_found_revokes;
  	unsigned int jd_replayed_blocks;
  
  	struct list_head jd_revoke_list;
  	unsigned int jd_replay_tail;

  };

  struct gfs2_statfs_change_host {
  	s64 sc_total;
  	s64 sc_free;
  	s64 sc_dinodes;
  };

  #define GFS2_QUOTA_DEFAULT	GFS2_QUOTA_OFF
  #define GFS2_QUOTA_OFF		0
  #define GFS2_QUOTA_ACCOUNT	1
  #define GFS2_QUOTA_ON		2
  
  #define GFS2_DATA_DEFAULT	GFS2_DATA_ORDERED
  #define GFS2_DATA_WRITEBACK	1
  #define GFS2_DATA_ORDERED	2

  #define GFS2_ERRORS_DEFAULT     GFS2_ERRORS_WITHDRAW
  #define GFS2_ERRORS_WITHDRAW    0
  #define GFS2_ERRORS_CONTINUE    1 /* place holder for future feature */
  #define GFS2_ERRORS_RO          2 /* place holder for future feature */
  #define GFS2_ERRORS_PANIC       3

  struct gfs2_args {

  	char ar_lockproto[GFS2_LOCKNAME_LEN];	/* Name of the Lock Protocol */
  	char ar_locktable[GFS2_LOCKNAME_LEN];	/* Name of the Lock Table */
  	char ar_hostdata[GFS2_LOCKNAME_LEN];	/* Host specific data */
  	unsigned int ar_spectator:1;		/* Don't get a journal */

  	unsigned int ar_localflocks:1;		/* Let the VFS do flock|fcntl */

  	unsigned int ar_debug:1;		/* Oops on errors */

  	unsigned int ar_posix_acl:1;		/* Enable posix acls */
  	unsigned int ar_quota:2;		/* off/account/on */
  	unsigned int ar_suiddir:1;		/* suiddir support */
  	unsigned int ar_data:2;			/* ordered/writeback */
  	unsigned int ar_meta:1;			/* mount metafs */

  	unsigned int ar_discard:1;		/* discard requests */

  	unsigned int ar_errors:2;               /* errors=withdraw | panic */

  	unsigned int ar_nobarrier:1;            /* do not send barriers */

  	unsigned int ar_rgrplvb:1;		/* use lvbs for rgrp info */

  	unsigned int ar_loccookie:1;		/* use location based readdir
  						   cookies */

  	s32 ar_commit;				/* Commit interval */
  	s32 ar_statfs_quantum;			/* The fast statfs interval */
  	s32 ar_quota_quantum;			/* The quota interval */
  	s32 ar_statfs_percent;			/* The % change to force sync */

  };
  
  struct gfs2_tune {
  	spinlock_t gt_spin;

  	unsigned int gt_logd_secs;

  	unsigned int gt_quota_warn_period; /* Secs between quota warn msgs */
  	unsigned int gt_quota_scale_num; /* Numerator */
  	unsigned int gt_quota_scale_den; /* Denominator */

  	unsigned int gt_quota_quantum; /* Secs between syncs to quota file */

  	unsigned int gt_new_files_jdata;

  	unsigned int gt_max_readahead; /* Max bytes to read-ahead from disk */

  	unsigned int gt_complain_secs;

  	unsigned int gt_statfs_quantum;
  	unsigned int gt_statfs_slow;
  };

  enum {
  	SDF_JOURNAL_CHECKED	= 0,
  	SDF_JOURNAL_LIVE	= 1,

  	SDF_WITHDRAWN		= 2,

  	SDF_NOBARRIERS		= 3,

  	SDF_NORECOVERY		= 4,

  	SDF_DEMOTE		= 5,

  	SDF_NOJOURNALID		= 6,

  	SDF_RORECOVERY		= 7, /* read only recovery */

  	SDF_SKIP_DLM_UNLOCK	= 8,

  	SDF_FORCE_AIL_FLUSH     = 9,

  	SDF_AIL1_IO_ERROR	= 10,

  	SDF_FS_FROZEN           = 11,

  };

  enum gfs2_freeze_state {
  	SFS_UNFROZEN		= 0,
  	SFS_STARTING_FREEZE	= 1,
  	SFS_FROZEN		= 2,
  };

  #define GFS2_FSNAME_LEN		256

  struct gfs2_inum_host {
  	u64 no_formal_ino;
  	u64 no_addr;
  };
  
  struct gfs2_sb_host {
  	u32 sb_magic;
  	u32 sb_type;
  	u32 sb_format;
  
  	u32 sb_fs_format;
  	u32 sb_multihost_format;
  	u32 sb_bsize;
  	u32 sb_bsize_shift;
  
  	struct gfs2_inum_host sb_master_dir;
  	struct gfs2_inum_host sb_root_dir;
  
  	char sb_lockproto[GFS2_LOCKNAME_LEN];
  	char sb_locktable[GFS2_LOCKNAME_LEN];
  };

  /*
   * lm_mount() return values
   *
   * ls_jid - the journal ID this node should use
   * ls_first - this node is the first to mount the file system
   * ls_lockspace - lock module's context for this file system
   * ls_ops - lock module's functions
   */
  
  struct lm_lockstruct {

  	int ls_jid;

  	unsigned int ls_first;

  	const struct lm_lockops *ls_ops;

  	dlm_lockspace_t *ls_dlm;

  	int ls_recover_jid_done;   /* These two are deprecated, */
  	int ls_recover_jid_status; /* used previously by gfs_controld */
  
  	struct dlm_lksb ls_mounted_lksb; /* mounted_lock */
  	struct dlm_lksb ls_control_lksb; /* control_lock */
  	char ls_control_lvb[GDLM_LVB_SIZE]; /* control_lock lvb */
  	struct completion ls_sync_wait; /* {control,mounted}_{lock,unlock} */

  	char *ls_lvb_bits;

  
  	spinlock_t ls_recover_spin; /* protects following fields */
  	unsigned long ls_recover_flags; /* DFL_ */
  	uint32_t ls_recover_mount; /* gen in first recover_done cb */
  	uint32_t ls_recover_start; /* gen in last recover_done cb */
  	uint32_t ls_recover_block; /* copy recover_start in last recover_prep */
  	uint32_t ls_recover_size; /* size of recover_submit, recover_result */
  	uint32_t *ls_recover_submit; /* gen in last recover_slot cb per jid */
  	uint32_t *ls_recover_result; /* result of last jid recovery */

  };

  struct gfs2_pcpu_lkstats {
  	/* One struct for each glock type */
  	struct gfs2_lkstats lkstats[10];
  };

  struct gfs2_sbd {
  	struct super_block *sd_vfs;

  	struct gfs2_pcpu_lkstats __percpu *sd_lkstats;

  	struct kobject sd_kobj;
  	unsigned long sd_flags;	/* SDF_... */

  	struct gfs2_sb_host sd_sb;

  
  	/* Constants computed on mount */

  	u32 sd_fsb2bb;
  	u32 sd_fsb2bb_shift;
  	u32 sd_diptrs;	/* Number of pointers in a dinode */
  	u32 sd_inptrs;	/* Number of pointers in a indirect block */
  	u32 sd_jbsize;	/* Size of a journaled data block */
  	u32 sd_hash_bsize;	/* sizeof(exhash block) */
  	u32 sd_hash_bsize_shift;
  	u32 sd_hash_ptrs;	/* Number of pointers in a hash block */
  	u32 sd_qc_per_block;

  	u32 sd_blocks_per_bitmap;

  	u32 sd_max_dirres;	/* Max blocks needed to add a directory entry */
  	u32 sd_max_height;	/* Max height of a file's metadata tree */

  	u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];

  	u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */

  
  	struct gfs2_args sd_args;	/* Mount arguments */
  	struct gfs2_tune sd_tune;	/* Filesystem tuning structure */
  
  	/* Lock Stuff */
  
  	struct lm_lockstruct sd_lockstruct;

  	struct gfs2_holder sd_live_gh;
  	struct gfs2_glock *sd_rename_gl;

  	struct gfs2_glock *sd_freeze_gl;

  	struct work_struct sd_freeze_work;

  	wait_queue_head_t sd_glock_wait;

  	wait_queue_head_t sd_async_glock_wait;

  	atomic_t sd_glock_disposal;

  	struct completion sd_locking_init;

  	struct completion sd_wdack;

  	struct delayed_work sd_control_work;

  
  	/* Inode Stuff */

  	struct dentry *sd_master_dir;
  	struct dentry *sd_root_dir;

  	struct inode *sd_jindex;

  	struct inode *sd_statfs_inode;

  	struct inode *sd_sc_inode;

  	struct inode *sd_qc_inode;
  	struct inode *sd_rindex;
  	struct inode *sd_quota_inode;

  	/* StatFS stuff */
  
  	spinlock_t sd_statfs_spin;

  	struct gfs2_statfs_change_host sd_statfs_master;
  	struct gfs2_statfs_change_host sd_statfs_local;

  	int sd_statfs_force_sync;

  
  	/* Resource group stuff */

  	int sd_rindex_uptodate;

  	spinlock_t sd_rindex_spin;

  	struct rb_root sd_rindex_tree;

  	unsigned int sd_rgrps;

  	unsigned int sd_max_rg_data;

  
  	/* Journal index stuff */
  
  	struct list_head sd_jindex_list;
  	spinlock_t sd_jindex_spin;

  	struct mutex sd_jindex_mutex;

  	unsigned int sd_journals;

  
  	struct gfs2_jdesc *sd_jdesc;
  	struct gfs2_holder sd_journal_gh;
  	struct gfs2_holder sd_jinode_gh;

  	struct gfs2_holder sd_sc_gh;

  	struct gfs2_holder sd_qc_gh;

  	struct completion sd_journal_ready;

  	/* Daemon stuff */

  	struct task_struct *sd_logd_process;
  	struct task_struct *sd_quotad_process;

  	/* Quota stuff */
  
  	struct list_head sd_quota_list;
  	atomic_t sd_quota_count;

  	struct mutex sd_quota_mutex;

  	struct mutex sd_quota_sync_mutex;

  	wait_queue_head_t sd_quota_wait;

  	struct list_head sd_trunc_list;
  	spinlock_t sd_trunc_lock;

  
  	unsigned int sd_quota_slots;

  	unsigned long *sd_quota_bitmap;

  	spinlock_t sd_bitmap_lock;

  	u64 sd_quota_sync_gen;

  
  	/* Log stuff */

  	struct address_space sd_aspace;

  	spinlock_t sd_log_lock;

  	struct gfs2_trans *sd_log_tr;

  	unsigned int sd_log_blks_reserved;

  	int sd_log_commited_revoke;

  	atomic_t sd_log_pinned;

  	unsigned int sd_log_num_revoke;

  	struct list_head sd_log_revokes;
  	struct list_head sd_log_ordered;

  	spinlock_t sd_ordered_lock;

  	atomic_t sd_log_thresh1;
  	atomic_t sd_log_thresh2;

  	atomic_t sd_log_blks_free;

  	atomic_t sd_log_blks_needed;

  	wait_queue_head_t sd_log_waitq;
  	wait_queue_head_t sd_logd_waitq;

  	u64 sd_log_sequence;

  	unsigned int sd_log_head;
  	unsigned int sd_log_tail;

  	int sd_log_idle;

  	struct rw_semaphore sd_log_flush_lock;

  	atomic_t sd_log_in_flight;

  	struct bio *sd_log_bio;

  	wait_queue_head_t sd_log_flush_wait;

  	int sd_log_error;

  	atomic_t sd_reserving_log;
  	wait_queue_head_t sd_reserving_log_wait;

  	unsigned int sd_log_flush_head;

  	spinlock_t sd_ail_lock;

  	struct list_head sd_ail1_list;
  	struct list_head sd_ail2_list;

  	/* For quiescing the filesystem */

  	struct gfs2_holder sd_freeze_gh;

  	atomic_t sd_freeze_state;
  	struct mutex sd_freeze_mutex;

  	char sd_fsname[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];

  	char sd_table_name[GFS2_FSNAME_LEN];
  	char sd_proto_name[GFS2_FSNAME_LEN];
  
  	/* Debugging crud */
  
  	unsigned long sd_last_warning;

  	struct dentry *debugfs_dir;    /* debugfs directory */

  };

  static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
  {
  	gl->gl_stats.stats[which]++;
  }
  
  static inline void gfs2_sbstats_inc(const struct gfs2_glock *gl, int which)
  {

  	const struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;

  	preempt_disable();
  	this_cpu_ptr(sdp->sd_lkstats)->lkstats[gl->gl_name.ln_type].stats[which]++;
  	preempt_enable();
  }

  extern struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl);

  static inline unsigned gfs2_max_stuffed_size(const struct gfs2_inode *ip)
  {
  	return GFS2_SB(&ip->i_inode)->sd_sb.sb_bsize - sizeof(struct gfs2_dinode);
  }

  #endif /* __INCORE_DOT_H__ */